APA-čujuhus (7. p.)
Orr, E. L., & Orr, W. N. (2012). Oregon geology (6th ed.). Oregon State University Press.
Chicago-čujuhus (17. p.)
Orr, Elizabeth L., juo William N. Orr. Oregon Geology. 6th ed. Corvallis: Oregon State University Press, 2012.
MLA-čujuhus (9. p.)
Orr, Elizabeth L., juo William N. Orr. Oregon Geology. 6th ed. Oregon State University Press, 2012.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.